(5) sections 2, 3, and 4 of the Act entitled An Act to amend section 2 of the Act entitled An Act to supplement existing laws against unlawful restraints and monopolies, and for other purposes, approved October 15, 1914, as amended (U.S.C., title
15, sec.
13), and for other purposes approved June 19, 1936 (
15 U.S.C.
21a,
13a, and
13b, commonly known as the Robinson-Patman Antidiscrimination Act).